CVE-2026-79651

HIGHPre-NVD 7.57.5—
EchelonGraph scoreHIGH confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-09-16. a secondary CVSS source baseline 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — Patch released this week
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 7.5Exploit: None knownExposed: 0

A fix is available — apply it.

A flaw was found in the theme localization endpoints of the keycloak-services component, which is the core service responsible for authentication flows and theme management in Keycloak. The issue occurs because the system accepts arbitrary locale tags from unauthenticated requests and stores them in a permanent in-memory cache without limits. An attacker can exploit this by sending a large number of unique locale tags, eventually causing the server to run out of memory and crash.

CVSS v3
7.5
EG Score
7.5(high)
EG Risk
49(Track)
EG Risk 49/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity75% × 45%
Exploitation1% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
48%
KEV
Not listed

Published

September 16, 2026

Last Modified

September 16, 2026

Advisory Details (6)

Auto-updated Sep 16, 2026
Patch available. Sources: redhat.
redhat

2523345 – (CVE-2026-79651) CVE-2026-79651 keycloak-services: keycloak-services: unauthenticated DoS via unbounded locale caching

https://bugzilla.redhat.com/show_bug.cgi?id=2523345
redhat Patch Available

CVE-2026-79651 - Red Hat Customer Portal

Affected: Red Hat Enterprise Linux 8 or OpenShift Container Platform 4, is affected by this vulnerability and a fix may be released to a

https://access.redhat.com/security/cve/CVE-2026-79651
redhat Patch Available
https://access.redhat.com/errata/RHSA-2026:68280
redhat Patch Available
https://access.redhat.com/errata/RHSA-2026:68278
redhat Patch Available
https://access.redhat.com/errata/RHSA-2026:68277
redhat Patch Available
https://access.redhat.com/errata/RHSA-2026:68276

Vendor Advisories for CVE-2026-79651(3)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(3)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatrhbk/keycloak-rhel92026-09-16redhat
redhatrhbk/keycloak-rhel9-operator:26.6-202026-09-16redhat
redhatrhbk/keycloak-rhel9-operator:26.4-262026-09-16redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Additional Vendor Advisories

(2)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 23× in last 7d / 23× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-09-18 20:37 UTCEG score recompute
  2. 2026-09-18 20:37 UTCVendor advisory
  3. 2026-09-18 20:37 UTCGHSA enrichment
  4. 2026-09-18 19:28 UTCEPSS rescore
  5. 2026-09-18 08:24 UTCVendor advisory
  6. 2026-09-18 08:24 UTCGHSA enrichment
  7. 2026-09-17 20:12 UTCEG score recompute
  8. 2026-09-17 20:12 UTCVendor advisory
  9. 2026-09-17 20:12 UTCGHSA enrichment
  10. 2026-09-17 07:57 UTCGHSA enrichment
  11. 2026-09-16 19:45 UTCGHSA enrichment
  12. 2026-09-16 19:25 UTCEG score recompute
  13. 2026-09-16 19:25 UTCGHSA enrichment
  14. 2026-09-16 18:25 UTCEG score recompute
  15. 2026-09-16 18:25 UTCGHSA enrichment
  16. 2026-09-16 16:32 UTCEG score recompute
  17. 2026-09-16 16:31 UTCGHSA enrichment
  18. 2026-09-16 15:50 UTCGHSA enrichment
  19. 2026-09-16 15:45 UTCEG score recompute
  20. 2026-09-16 15:45 UTCGHSA enrichment
  21. 2026-09-16 15:20 UTCEG score recompute
  22. 2026-09-16 15:01 UTCEG score recompute
  23. 2026-09-16 15:00 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-79651?
CVE-2026-79651 is a high vulnerability published on September 16, 2026. A flaw was found in the theme localization endpoints of the keycloak-services component, which is the core service responsible for authentication flows and theme management in Keycloak. The issue occurs because the system accepts arbitrary locale tags from unauthenticated requests and stores them…
When was CVE-2026-79651 disclosed?
CVE-2026-79651 was first published in the National Vulnerability Database on September 16, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-79651 actively exploited?
CVE-2026-79651 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 51.6% of all scored CVEs.
What is the CVSS score of CVE-2026-79651?
CVE-2026-79651 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2026-79651?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-79651, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2026-79651

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